Explicitly specify IPv[46]
Explicitly specify IPv[46]

Change-Id: I322962c60f11ddbf0877aabd1aad243dafcae7dd
Reviewed-on: http://review.couchbase.org/55433
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Dave Rigby <a09264da4832c7ff1d3bf1608a19f4b870f93750@couchbase.com>

couchbase/memcached,daverigby/memcached,couchbase/memcached,daverigby/kv_engine,daverigby/memcached,owendCB/memcached,couchbase/memcached,daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine,couchbase/memcached,daverigby/memcached,owendCB/memcached,daverigby/memcached,owendCB/memcached,owendCB/memcached